This is the group output board SC3531B ISS 3 And meter SC3535B ISS2 form a Soundcraft later version Live board, earlier versions had the thicker buttons and and square push buttons, this one has the oval push buttons on
I now have also SC3531B iss 5 and meter board SC3535B iss 4
This Channel specifically came from a Soundcraft live 4-2 mixer.
All of these Soundcraft mixers were very good value and now many are being repaired for the "British EQ" sound, its also about getting hands on knob twiddling fun that you just do not get on the digital side of things.
The electronics here is pretty straight forward, using standard pots and TLO72 amps, if you have one of these its worth having an extra channel that you can just drop and swap if needed.
This has to be packed well and goes by courier because of its size
Can send outside of the UK contact me for an exact qoute